Gentoo's Bugzilla –
Attachment 856856 Details for
Bug 900420sys-devel/llvm-15.0.7 - fails to build on musl ppc (libicuuc.so.72: undefined reference to `std::conditio n_variable::wait(std::unique_lock<std::mutex>&)@GLIBCXX_3.4.30') when dev-libs/icu is built with GCC-12